Engine Controls Schematics. Chevrolet Chevy C Cab/Chassis HD (GMT 400) 2002

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2002 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Engine Controls Schematics

Figure 1:	PCM Power, Grounding, DLC, and MIL Master Electrical Component List Powertrain Control Module Description 5 Volt and Low Reference Busses OBD II Symbol Description Notice ECM-B, Horn, and A/C Fuses IGN A Fuse and Ignition Switch ECM-I Fuse, 1 of 2, Fuel Injectors IGN A Fuse and Ignition Switch IP Illumination Lamps and Indicator Lamps Gauges and Turn-B/U Fuses IP Illumination Lamps and Indicator Lamps Datalink Connector Schematic G104 (L18) L18 HO2S Circuit
Figure 2:	5 Volt and Low Reference Busses Master Electrical Component List Powertrain Control Module Description L18 MAP, ECT, and IAT/MAF Sensor L18 PCM Power, Grounding, DLC, and MIL Control OBD II Symbol Description Notice
Figure 3:	MAP, ECT, VSS Circuit, and IAT/MAF Master Electrical Component List Powertrain Control Module Description L18 HO2S Circuit 5 Volt and Low Reference Busses OBD II Symbol Description Notice IGN A Fuse and Ignition Switch L18 EVAP and EGR Circuits G104 (L18) PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors CPP Switch and VSS - L18 EBCM Stoplamp switch and Wheel Speed Inputs Fuel Gauge, Tachometer, and Speedometer Oil Pres, Coolant Temp, and Volt Gauges, Check Gauges and Batt Lamp
Figure 4:	HO2S Circuit Master Electrical Component List Powertrain Control Module Description L18 TAC Power, Grounding, Data Circuits, and Indicator Control L18 MAP, ECT, and IAT/MAF Sensor OBD II Symbol Description Notice L18 PCM Power, Grounding, DLC, and MIL Control G104 (L18) L18 PCM Power, Grounding, DLC, and MIL Control
Figure 5:	TAC Power, Grounding, Data Circuits, and Indicator Control Master Electrical Component List Throttle Actuator Control (TAC) System Description L18 Throttle Control Circuits L18 HO2S Circuit OBD II Symbol Description Notice IGN A Fuse and Ignition Switch IGN-E and ENG I Fuses - Gas G104 (L18) IGN A Fuse and Ignition Switch Gauges and Turn-B/U Fuses IP Illumination Lamps and Indicator Lamps
Figure 6:	Throttle Control Circuits Master Electrical Component List Throttle Actuator Control (TAC) System Description L18 Accelerator Pedal Position Sensor Circuits L18 TAC Power, Grounding, Data Circuits, and Indicator Control OBD II Symbol Description Notice
Figure 7:	Accelerator Pedal Position Sensor Circuits Master Electrical Component List Throttle Actuator Control (TAC) System Description TAC Cruise Control Inputs and PTO Interfaces L18 Throttle Control Circuits OBD II Symbol Description Notice
Figure 8:	TAC Cruise Control Inputs Master Electrical Component List Throttle Actuator Control (TAC) System Description L18 PTO Control Provisions L18 Accelerator Pedal Position Sensor Circuits OBD II Symbol Description Notice Stop/Haz, Radio Batt, Aux Pwr, and Cig Ltr Fuses Lighting and Battery Fuses ABS, Blower, Stop-Haz, and IGN B Fuses and Ignition Switch L18 PTO Control Provisions Brake, Cruise, SEO TP-2, and Htr-A/C Fuses L18 PTO Control Provisions L18 PTO Control Provisions Stop Lamps and Turn/Hazard Lamps Controls
Figure 9:	PTO Control Provisions Master Electrical Component List L18 Ignition Control - Bank 1 (LH) TAC Cruise Control Inputs and PTO Interfaces OBD II Symbol Description Notice Battery and Underhood Fuse Block TAC Cruise Control Inputs and PTO Interfaces ABS, Blower, Stop-Haz, and IGN B Fuses and Ignition Switch Instrument Lamps Dimming Circuit Instrument Lamps Dimming Circuit TAC Cruise Control Inputs and PTO Interfaces TAC Cruise Control Inputs and PTO Interfaces G200 TAC Cruise Control Inputs and PTO Interfaces TAC Cruise Control Inputs and PTO Interfaces G105, L18, All except Ignition Coils
Figure 10:	Ignition Control, Bank 1 (Left Side) Master Electrical Component List Electronic Ignition (EI) System Description L18 Ignition Control - Bank 2 (RH) L18 PTO Control Provisions OBD II Symbol Description Notice IGN A Fuse and Ignition Switch ECM-I Fuse, 2 of 2, Ignition Coils G105, 2 of 2, Ignition Coils
Figure 11:	Ignition Control, Bank 2 (Right Side) Master Electrical Component List Electronic Ignition (EI) System Description L18 CMP, CKP, and KS L18 Ignition Control - Bank 1 (LH) OBD II Symbol Description Notice IGN A Fuse and Ignition Switch ECM-I Fuse, 2 of 2, Ignition Coils G105, 2 of 2, Ignition Coils
Figure 12:	CMP, CKP, and KS Master Electrical Component List Knock Sensor (KS) System Description L18 Fuel Pump Controls - Single Tank L18 Ignition Control - Bank 2 (RH) OBD II Symbol Description Notice Fuel Gauge, Tachometer, and Speedometer
Figure 13:	Fuel Pump Controls, Single Tank Master Electrical Component List Fuel System Description L18 Fuel Pump Controls - Dual Tanks L18 CMP, CKP, and KS OBD II Symbol Description Notice Battery and Underhood Fuse Block L18 PCM Power, Grounding, DLC, and MIL Control Theft Deterrent System Datalink Connector Schematic Fuel Gauge, Tachometer, and Speedometer G105, L18, All except Ignition Coils
Figure 14:	Fuel Pump Controls, Dual Tanks Master Electrical Component List Fuel System Description L18 Fuel Injector Controls L18 Fuel Pump Controls - Single Tank OBD II Symbol Description Notice Battery and Underhood Fuse Block L18 PCM Power, Grounding, DLC, and MIL Control IGN A Fuse and Ignition Switch IGN-E and ENG I Fuses - Gas Theft Deterrent System Datalink Connector Schematic Fuel Gauge, Tachometer, and Speedometer G105, L18, All except Ignition Coils
Figure 15:	Fuel Injector Controls Master Electrical Component List Fuel System Description L18 EVAP and EGR Circuits L18 Fuel Pump Controls - Dual Tanks OBD II Symbol Description Notice IGN A Fuse and Ignition Switch ECM-I Fuse, 1 of 2, Fuel Injectors
Figure 16:	EVAP and EGR Master Electrical Component List Exhaust Gas Recirculation (EGR) System Description HVAC, Generator, and ABS Signal Circuits L18 Fuel Injector Controls OBD II Symbol Description Notice IGN A Fuse and Ignition Switch L18 MAP, ECT, and IAT/MAF Sensor
Figure 17:	5 Volt and Low Reference Busses Master Electrical Component List Powertrain Control Module Description L18 A/T TCC/Stop Lamp Switch, Shift Solenoids L18 EVAP and EGR Circuits OBD II Symbol Description Notice Air Conditioning Compressor Control (L18) L18 Charging Datalink Connector Schematic EBCM Power, Grounding, DLC, and Indicator Lamps Oil Pres, Coolant Temp, and Volt Gauges, Check Gauges and Batt Lamp
Figure 18:	A/T TCC/Stop Lamp Switch, Shift Solenoids Master Electrical Component List Electronic Component Description L18 A/T Internal Switches, TFT, and PC Solenoid Valve HVAC, Generator, and ABS Signal Circuits OBD II Symbol Description Notice ABS, Blower, Stop-Haz, and IGN B Fuses and Ignition Switch Brake, Cruise, SEO TP-2, and Htr-A/C Fuses IGN A Fuse and Ignition Switch TCC/Stoplamps Switch and Shift Solenoids Pwr Wdos Circuit Breaker, Wiper, Radio, Crank, and Trans Fuses TCC/Stoplamps Switch and Shift Solenoids TCC/Stoplamps Switch and Shift Solenoids EBCM Stoplamp switch and Wheel Speed Inputs
Figure 19:	A/T Internal Switches, TFT, PC Solenoid Valve Master Electrical Component List Electronic Component Description L18 A/T TCC/Stop Lamp Switch, Shift Solenoids OBD II Symbol Description Notice PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors PNP Switch, Pressure Switch, TFT Sensor, PC Sol Valve, Shaft Speed Sensors